Struts2、Hibernate、Spring整合时如何向Servlet注入属性

最新推荐文章于 2019-10-22 17:52:43 发布

原创最新推荐文章于 2019-10-22 17:52:43 发布 · 4.9k 阅读

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#spring #hibernate #servlet #struts #sqlserver #class

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本文介绍如何在Spring框架中整合Hibernate进行数据库操作，并实现声明式事务管理。通过具体的XML配置示例，展示了数据源、SessionFactory、HibernateTemplate等组件的配置过程。

1.Spring数据库的配置

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd ">  <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean" scope="singleton"> <property name="dataSource" ref="dataSource"/> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect"> org.hibernate.dialect.SQLServerDialect </prop> <prop key="hibernate.show_sql">true</prop>  <prop key="jdbc.use_scrollable_resultset">true</prop> <prop key="hbm2ddl">true</prop> </props> </property> <property name="mappingResources"> <list> <value>abu/csdn/bean/User.hbm.xml</value> </list> </property> </bean>  <bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate" scope="singleton"> <property name="sessionFactory" ref="sessionFactory"/> </bean>  <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" scope="singleton"> <property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"> </property> <property name="url" value="jdbc:sqlserver://localhost:1433;databaseName=csu"> </property> <property name="username" value="liky"/> <property name="password" value="redhat"/> </bean>  <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"/> </bean>  <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes>  <tx:method name="save*" propagation="REQUIRED" /> <tx:method name="delete*" propagation="REQUIRED" /> <tx:method name="update*" propagation="REQUIRED" /> <tx:method name="find*" read-only="true" /> </tx:attributes> </tx:advice>  <aop:config>  <aop:pointcut id="allServiceMethods" expression="execution(* abu.csdn.service.*.*(..))" />  <aop:advisor pointcut-ref="allServiceMethods" advice-ref="txAdvice" /> </aop:config> </beans>

2.Servlet

package abu.csdn.servlet; import java.io.IOException; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.orm.hibernate3.HibernateTemplate; import org.springframework.web.context.WebApplicationContext; import org.springframework.web.context.support.WebApplicationContextUtils; /** * <p> * 演示使用Spring向Servlet注入对象 * </p> * User: Abu Date: 2009-7-2 Time: 14:30:55 */ public class CopyOfShowImageServlet extends HttpServlet { HibernateTemplate hibernateTemplate; /** * <p> * 在Servlet中注入对象的步骤: * 1.取得ServletContext * 2.利用Spring的工具类WebApplicationContextUtils得到WebApplicationContext * 3.WebApplicationContext就是一个BeanFactory,其中就有一个getBean方法 * 4.有了这个方法就可像平常一样为所欲为了,哈哈! * </p> */ @Override public void init() throws ServletException { super.init(); ServletContext servletContext = this.getServletContext(); WebApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(servletContext); hibernateTemplate = (HibernateTemplate)ctx.getBean("hibernateTemplate"); } @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { } }

3.总结

你应该看到了,我在Spring中使用了声明式事务,如果直接使用Spring的工厂类在这里是不行的,因为所有的对象都已经有Spring的IoC管理了,所以只能借助WebApplicationContextUtils这个工具类来获得Bean.